Bridge 450 - Rugby Viaduct

L1912. One of the piers of Rugby Viaduct - Bridge 450 - as seen in June 1977. The structure was built from hard, blue engineering bricks called Staffordshire Blues. Dressed stone blocks were used to support the springing of the five course brick arches. Such materials were used throughout the construction of the London Extension, with nearly all bridges and viaducts incorporating them. Of note in this picture is the projecting portion of the parapet, which formed a recess to allow workmen to stand clear of passing trains.